/Engine/Plugins/Enterprise/DatasmithImporter/Source/ExternalSource/Public/ExternalSource.h
typedef TMulticastDelegate_OneParam< void, const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [UE::DatasmithImporter::FExternalSource](API\Plugins\ExternalSource\FExternalSource) > & > OnExternalSourceChangedDelegate